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Top-Rated Addition to existing structure builders in Campbell - Updated Nov 2026

Avatar for Herman Construction Company
Herman Construction Company
5.0(
23
)
Addition to Existing Structure - Build

Serving Campbell, CA and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

"Karol is a very nice guy to work with. He is approachable, easy to communicate with. He goes through the project from end to end on our first visit, explain how he would build the frame, cut the wood, the timeline. He also finds a stone guy and coordinates the work. When actually doing the work, he puts cardboards on our floor to avoid scratching. Upon request, he also did a prototype for us, and when we change our mind to use a different style, he redoes the bulk of the project. I would recommend Karol to anyone who needs carpenter work!"
Home Addition
Home Addition
Home Additon
Home Additon
Home Addition

+25

Response time7 hrs
Recommended by78%of homeowners
Avatar for Skytech Builders
Skytech Builders
5.0(
21
)
Addition to Existing Structure - Build

Serving Campbell, CA and surrounding areas

Approved

In business since 2013

Free estimates

Warranties offered

"As most of us know when we do a remodeling project, it is real hard to find good and honest people to complete your project. Fortunately, I found Leo and Yonathan from SkyTech Builders to help me with remodeling and repairing two of the bathrooms in my family's 4-Plex building. They were very honest, polite and helpful each step of the process from start to finish. The are very patient and suggested materials and design but always thinking about quality and your budget. Overall the experience with Leo and Yonathan was top notch and we were very satisfied with the finished product. We will definitely be using Sky Tech Builders for our future construction projects."
Master Bathroom Remodel in San Jose.
Kitchen Remodel in San Mateo
Kitchen remodeling in Fremont
Master Bathroom Remodel in San Jose.
Kitchen Remodel in San Mateo

+63

Response time1 day
Response rate100%
12 neighbors recently requested a quote
Avatar for Herman Construction Company
Herman Construction Company
5.0(
31
)
Addition to Existing Structure - Build

Serving Campbell, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2004

Free estimates

Warranties offered

"Karol was a very professional and organized contractor. He was patient and listened to what I needed. He made sure to keep our house clean and protected during the construction. I refered him to a neighbor and my neighbor has given him many projects. I would hire Herman construction again for all my work."
Second floor House addition in progress. San Jose
second floor house addition before San Jose
Second floor house addition complete
second floor house addition in progress
Recommended by67%of homeowners
Avatar for Tool Time Home Improvement
Tool Time Home Improvement
4.6(
208
)
Addition to Existing Structure - Build

Serving Campbell, CA and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

"Tool Time was absolutely fabulous. Extremely professional and thorough. From beginning until end, everything was outstanding. No detail was overlooked. This was a step down for my mother‘s home, she couldn’t be happier. It looks as though it was installed at the same time the other banister was. 100% GREAT JOB !!!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+16

Response time1 day
Response rate100%
10 neighbors recently requested a quote
Avatar for Zacarias Remodeling Construction
Zacarias Remodeling Construction
5.0(
33
)
Addition to Existing Structure - Build

Serving Campbell, CA and surrounding areas

Approved

In business since 2009

Free estimates

Customers say: True professional

"Zacarias Remodeling Construction is AMAZING! Oscar and his crew recently did a complete kitchen/ family room renovation for us and it was such a wonderful experience. Oscar and his team are incredibly professional and "can do". We were living at our vacation house during the renovation and trusted them to make decisions and keep us in the loop with calls, texts, and photos. They were always so responsive and did beautiful work. We had several unexpected structural issues arise that were due to previous work that another contractor had done at our house, and they found creative and cost effective ways to correct the problems. They are also just such lovely people--so kind and accommodating, always trying to make the client happy. And they kept the job site very clean and tidy. We trusted them completely to keep our home safe while we were living remotely. We cannot recommend them highly enough for any sized job. Their workmanship is phenomenal and our kitchen/family room turned out gorgeous!"
Remodeling - General Project
Remodeling - General Project
Remodeling - General Project
New kitchen, bedroom and bathroom
Remodeling - General Project

+50

20 neighbors recently requested a quote
Recommended by87%of homeowners
LEES PRO BUILDER
4.6(
48
)
Addition to Existing Structure - Build

Serving Campbell, CA and surrounding areas

Approved

In business since 1989

Free estimates

Warranties offered

"I have been looking to get the recessed lights done for years, but couldn’t find the right people that I could trust. During consultation, I was able to trust them with their knowledge and their professionalism, and the results were beyond my expectation. I was out of town during the installation, but they cleaned everything at the end and installation was all done without any defects."
Photos of my work
Photos of my work
Photos of my work
Photos of my work
Photos of my work

+8

2 neighbors recently requested a quote
Recommended by77%of homeowners
Avatar for On Design & Remodeling INC
On Design & Remodeling INC
5.0(
46
)
Addition to Existing Structure - Build

Serving Campbell, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Credit card accepted

"I recently had the pleasure of working with ON design for a significant addition and removal project at my home. From start to finish, their professionalism and attention to detail were impeccable. They communicated clearly throughout the process, ensuring I was always up to date with the progress. The quality of their work was exceptional, and they completed the project on time and within budget. I couldn't be happier with the transformation they brought to my home. Highly recommend their services!"
The Willow Oaks project
First floor kitchen and stairs
Master Bathroom remodeling
Open concept Kitchen
The Willow Oaks project

+421

Response time2 days
Response rate100%
27 neighbors recently requested a quote
Avatar for Clever Design and Remodeling, Inc.
Clever Design and Remodeling, Inc.
5.0(
22
)
Addition to Existing Structure - Build

Serving Campbell, CA and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"My kitchen has been utterly transformed, in the most wonderful way by the great staff and crew at Clever Design and Remodeling. Roy came to my home to give me an estimate, describe the whole process, and was very clear and concise in his explanations. He answered all my questions with great patience and was available throughout the installation process by phone or email in case I needed additional info. We also needed a double vanity in our bathroom which he custom built for us. When they were done with the vanity, painting, and the cabinets, we decided to get the same countertops that they guys used in the bathroom for our kitchen and redo the backsplash as well. They were all super easy to communicate with. All the guys that we worked with were very professional, and they cleaned up, so we could use the kitchen even with it torn apart. Overall, the final result is everything turned out gorgeous."
Kitchen
Kitchen
Master bathroom
Living Room
Kitchen

+270

Response time12 hrs
Response rate85%
5 neighbors recently requested a quote
Avatar for LeCut Construction
LeCut Construction
5.0(
62
)
Addition to Existing Structure - Build

Serving Campbell, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Warranties offered

"This company delivered solid construction results with great attention to safety and quality. The crew was experienced and organized. The final build looks excellent. Very happy with their work."
kitchen
kitchen
kitchen
bathroom
bathroom

+165

Response time1 day
Response rate87%
Recommended by29%of homeowners
Avatar for Quartz Construction
Quartz Construction
4.7(
77
)
Addition to Existing Structure - Build

Serving Campbell, CA and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"First of all, these guys are rockstars. I never thought that I will say this about contractors - but they really impressed us with their professionalism and quality of work. We bought a new house with a big yard for our kids to run around (realizations during the pandemic), but it meant that we had to compromise on the quality of the house interior. It looked really old and didn't look renovated after it was build in the 60s. I started talking to general contractors to get it remodelled and was shocked by the timelines and prices being quoted. I found Ohad (owner of Quartz Construction) via yelp reviews and what struck me most was that everyone was commenting on his clear communication. We had done a remodel of our townhome in the past and it was not a great experience since the contractor kept changing timelines and prices in the middle of the job. My wife and I went to their office and had a detailed conversation with Ohad on what we were looking for. We had just a vague idea of what we wanted and this is where Ohad really helped us. He worked with us to create a plan on how we can make the home better and he even played the role of the designer to change the layout to create a new bedroom and bathroom. Post that, he drafted up everything and gave us a detailed quote on everything. 1. Remove 2 fireplaces and an indoor bbq pit within the home. 2. Change complete flooring. 3. Remove the popcorn cieling (and asbestos) and put new cieling. 4. Complete remodel of kitchen including structural changes. 5. Complete remodel of 2 bathrooms. 6. Construction of a new room and bathroom (with structural change). 7. Remodel the laundry room and guest washroom. 8. Recess lights across the house (close to 80 + recess lights across the house). 9. Painting interior and exterior. 10. New sub-panel for appliances. 11. All the required permits for these. Ohad a quoted a very reasonable price for all of this and he quoted 2 months to finish the project. I was a bit shocked, but he was very confident about it. We really liked the way he communicated and had an open discussion about everything, so we decided to go with him. Ohad had promised us that we will see progress in our house everyday and he kept that promise. His workers are honest, hard working folks and we were really impressed by everyone - especially Omar who was the worksite supervisor. The workers showed up everyday on time (8 am or earlier) and left late evening by 7 pm. They left the worksite so clean after every day's work that we used to wonder whether they were planning to come back the next day :-). Even our new neighbors were commenting about the punctuality and asked us for the contractors phone number for their remodeling (without seeing the interior, just based on the punctuality). We were expecting it to at least take 3-4 months and were prepared for the wait - but the entire project finished in 2 months a 1 week ( 1 week over the agreed timeline). And, the reason why it took 1 week more was since we added exterior painting and slanting roof+insulation for our new bedroom at the last moment. Since almost everything at our place was new, there were things to be fixed and reconfigured after we moved in. Anything we called and asked for was done the same day or the immediate next day. Everyone coming in and seeing the house cannot believe that it was done in 9 weeks (and within the budget) and a lot of my friends are now planning remodelling keeping Ohad and Quartz construction in mind. Ohad always says that he is "talking out loud" so that there is no confusion. It is his way of making sure that everyone is on the same page and there are no surprises. He is brutally honest and that is the best quality a contractor should have. This was the biggest remodeling we ever did and we were expecting a grind - but it was a breeze thanks to Ohad and his men. Highly recommended !!"
bathroom
bathroomremodel
stairs
stairs
wood deck

+252

Response time2 days
Recommended by87%of homeowners
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FAQs for addition to existing structure building service projects in Campbell, CA

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Campbell, CA homeowners’ guide to addition to existing structure building services

From average costs to expert advice, get all the answers you need to get your job done.